The lovely woman from ebay got back to me today, She found me a three

Everything is going as planned for Jakes Birthday BUT Josh's birthday is 14 days before Jakes and I havent organised a thing for him.
I have bought his presents but other than that I just can do anything for him

I feel like a terrible person and a useless parent right now. I love both my boys (and my lil lady) more than anything but why is this birthday so hard?
What sort of parent cant bring themselves to celebrate the 2nd birthday of a longed for child?
Maybe I dont deserve my children if I cant stop my grief interfering in there lives